JPS63181352A - Semiconductor substrate - Google Patents

Semiconductor substrate

Info

Publication number
JPS63181352A
JPS63181352A JP1268987A JP1268987A JPS63181352A JP S63181352 A JPS63181352 A JP S63181352A JP 1268987 A JP1268987 A JP 1268987A JP 1268987 A JP1268987 A JP 1268987A JP S63181352 A JPS63181352 A JP S63181352A
Authority
JP
Japan
Prior art keywords
substrate
garnet
epitaxial layer
insb
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1268987A
Other languages
Japanese (ja)
Inventor
Akira Miura
明 三浦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP1268987A priority Critical patent/JPS63181352A/en
Publication of JPS63181352A publication Critical patent/JPS63181352A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make it possible to form an InSb epitaxial layer with excellent characteristics, by forming, on a garnet system substrate, a III-V compound semiconductor epitaxial layer in which Sb as the group V element is applied to base. CONSTITUTION:On the surface of a garnet system substrate 3, a first epitaxial layer 4 of III-V compound semiconductor in which Sb as the group V element is applied to base, for example InSb, is formed in thickness of about 100-200Angstrom in a temperature atmosphere with the range from room temperature to 400 deg.C. Under the condition where the growth of the first layer is once interrupted, the garnet substrate 3 is heated at 450-600 deg.C, and a second InSb epitaxial layer 5 about 1mum thick is formed on the surface of the first InSb layer 4 under the condition where the garnet substrate 3 is heated. By performing the epitaxial growth of two stages in such a manner, the crystallographic axis of the second epitaxial layer 6 coincides with that of the garnet system substrate 3.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、半導体基板に関するものであり、超高速半導
体装置に好適な新しい半導体基板に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a semiconductor substrate, and relates to a new semiconductor substrate suitable for ultra-high speed semiconductor devices.

(従来の技術) 電子移動度の大きい材料として、V族としてSbをベー
スとした■−v族化合物半導体が注目されている。
(Prior Art) As a material with high electron mobility, a -V group compound semiconductor based on Sb is attracting attention as a V group.

ところが、このようなV族としてsbをベースとした■
−v族化合物半導体は格子定数が極めて大きいことから
、エピタキシャル層を形成するための適当な基板がない
と考えられていて、例えば第4図に示すように、Al2
203がドープされたS!02基板1上に例えば蒸着に
よりInSb層2を形成するとともにこのInSb層2
をZMR(ZoneMelting  Recryst
alization)法によってエピタキシャル成長さ
せることが行われていた。
However, as such a V group based on sb ■
-V group compound semiconductors have extremely large lattice constants, so it is thought that there is no suitable substrate for forming an epitaxial layer.For example, as shown in Figure 4, Al2
203 doped S! 02 An InSb layer 2 is formed on the substrate 1 by, for example, vapor deposition, and this InSb layer 2 is
ZMR (Zone Melting Recryst)
Epitaxial growth was performed using a method (alization).

(発明が解決しようとする問題点) しかし、このような八ρ203がドープされたS!02
基板2は一種のガラスであることから、基板上に形成さ
れるJnSb層2の結晶軸は揃いにくく、エッチビット
密度がlX10’個/ cm2程度となってInSbの
バルク単結晶と比較すると電子移動度などにおいて十分
な特性が得られないという欠点があった。
(Problem to be Solved by the Invention) However, when such 8ρ203 is doped S! 02
Since the substrate 2 is a type of glass, the crystal axes of the JnSb layer 2 formed on the substrate are difficult to align, and the etch bit density is about 1 x 10' bits/cm2, which reduces electron transfer compared to the bulk single crystal of InSb. It has the disadvantage that sufficient characteristics cannot be obtained in terms of temperature, etc.

本発明は、このような点に着目したもので、その目的は
、V族としてsbをベースとしたI−4液化合物半導体
のエピタキシャル層を有する特性の優れた半導体基板を
提供することにある。
The present invention has focused on such points, and an object thereof is to provide a semiconductor substrate with excellent characteristics having an epitaxial layer of an I-4 liquid compound semiconductor based on sb as a V group.

(問題点を解決するための手段) このような目的を達成する本発明は、ガーネット系基板
上に、V族としてsbをベースとしだ■−V族化合物半
導体エピタキシャル層が形成されたことを特徴とする。
(Means for Solving the Problems) The present invention that achieves the above object is characterized in that an epitaxial layer of a -V group compound semiconductor based on sb as a V group is formed on a garnet-based substrate. shall be.

(実施例) 以下、図面を用いて詳細に説明する。(Example) Hereinafter, it will be explained in detail using the drawings.

第1図は、本発明の一実施例を示す構成説明図である。FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.

第1図において、3はQd3 Gas O+2、Nd3
GasO+2+ SmzGasO+2゜Y3 AQ50
+ 2などのガーネット系基板、4はこのガーネット系
基板3の表面に形成された[nSb、GaAS−AR8
bなどのV族としてsbをベースとしたI[[−V族化
合物半導体の第1のエピタキシャル層、5は第1のエピ
タキシャル層4の表面に形成された第1のエピタキシャ
ル層4と同様な組成の第2のエピタキシャル層である。
In Figure 1, 3 is Qd3 Gas O+2, Nd3
GasO+2+ SmzGasO+2゜Y3 AQ50
+ 2 and other garnet-based substrates, 4 is formed on the surface of this garnet-based substrate 3 [nSb, GaAS-AR8
A first epitaxial layer of I[[-V group compound semiconductor based on sb as V group such as b, 5 has the same composition as the first epitaxial layer 4 formed on the surface of the first epitaxial layer 4 This is the second epitaxial layer.

このような半導体基板の製造工程について、第2図を用
いて説明する。まず、工程(a)において、ガーネット
系基板3の表面にV族としてsbをベースとした■−v
族化合物半導体1例えば■n3bの第1のエピタキシャ
ル[4を室温〜400℃程度の温度雰囲気でMVEやM
OCVDにより100A〜200人程度の厚さで形成す
る。なお、ガーネット系基板3としては、例えば(11
1)あるいは(100)カットのGd3Ga5O12を
用いる。その後、第1のWI4の成長を一旦停止させた
状態でガーネット基板3を450℃〜600℃程度に加
熱する。そして、このようにガーネット基板3を加熱し
た状態の工程(b)において、第1のInSb層4の表
面に厚さが1μm程度の第2のInSbエピタキシャル
層5を形成する。
The manufacturing process of such a semiconductor substrate will be explained using FIG. 2. First, in step (a), ■-v based on sb as the V group on the surface of the garnet-based substrate 3.
Group compound semiconductor 1, for example, the first epitaxial layer of n3b [4] is subjected to MVE or M
It is formed by OCVD to a thickness of about 100A to 200A. In addition, as the garnet-based substrate 3, for example (11
1) Or (100) cut Gd3Ga5O12 is used. Thereafter, the garnet substrate 3 is heated to about 450° C. to 600° C. while the growth of the first WI 4 is temporarily stopped. Then, in step (b) with the garnet substrate 3 heated in this manner, a second InSb epitaxial layer 5 having a thickness of about 1 μm is formed on the surface of the first InSb layer 4.

このようにして2段階でエピタキシャル成長を行うこと
により、第2の)n3b工ピタキシヤル層5の結晶軸は
ガーネット系基板3の結晶軸と揃うことになる。
By performing the epitaxial growth in two steps in this manner, the crystal axis of the second (n3b) epitaxial layer 5 is aligned with the crystal axis of the garnet-based substrate 3.

第3図は本発明における各構成要素の結晶構造図であり
、(a)はガーネット系基板3として用いるGd5Ga
50+ 2 (7)結a 構’U ヲ示Ll、(b)は
1nsbl15の結晶構造を示している。すなわち、ガ
ーネット系基板3として用いる(3d3 Ga5O12
の結晶構造は非磁性キュービックガーネットに属するも
ので、格子定数aOは12,383人となる。一方、■
nSb層5の結晶構造はせん亜鉛鉱に属するもので格子
定数a0は6.48人となる。
FIG. 3 is a crystal structure diagram of each component in the present invention, and (a) is a Gd5Ga used as the garnet-based substrate 3.
50+ 2 (7) Structure 'U Show Ll, (b) shows the crystal structure of 1nsbl15. That is, used as the garnet-based substrate 3 (3d3 Ga5O12
Its crystal structure belongs to non-magnetic cubic garnet, and its lattice constant aO is 12,383 atoms. On the other hand,■
The crystal structure of the nSb layer 5 belongs to splenite, and the lattice constant a0 is 6.48.

ここで、これらガーネット系基板3およびInSb層5
の格子定数に着目すると、ガーネット系基板3の格子定
数の1/2の値とIn5b15の格子定数との不整合の
比率は約4.5%になる。この比率は、SO8基板にお
けるシリコンとサファイアとの不整合の比率とほぼ等し
い値であって実用上無視できるものであり、従来のガラ
ス基板を用いるものに比べて格段に優れた特性を有する
(nsbエピタキシャル層を形成することができる。
Here, these garnet-based substrate 3 and InSb layer 5
Focusing on the lattice constant of In5b15, the ratio of mismatch between 1/2 of the lattice constant of the garnet-based substrate 3 and the lattice constant of In5b15 is about 4.5%. This ratio is almost the same as the mismatch ratio between silicon and sapphire in the SO8 substrate, and can be ignored in practice, and has much superior characteristics compared to those using conventional glass substrates (nsb An epitaxial layer can be formed.

このように構成される基板を用いて例えばMOを構成す
ることにより、高い絶縁性を有するガーネット系基板上
にV族としてsbをベースとした■−v族化合物半導体
エピタキシャル層が形成されていることから配線容量を
無視することができ、超高速特性を有する素子が得られ
る。また、赤外線検出器を構成する場合にはエツチング
により素子間を完全に分離することができ、簡単な構造
で集積度の高い赤外線検出器が得られる。
By configuring an MO using a substrate configured in this manner, for example, a ■-V group compound semiconductor epitaxial layer based on sb as a V group is formed on a garnet-based substrate having high insulating properties. Since the wiring capacitance can be ignored, an element with ultra-high speed characteristics can be obtained. Furthermore, when constructing an infrared detector, the elements can be completely separated by etching, resulting in a highly integrated infrared detector with a simple structure.

(発明の効果) 以上説明したように、本発明によれば、V族としてsb
をベースとした■−v族化合物半導体のエピタキシャル
層を有する特性の浸れた半導体基板が実現できる。
(Effect of the invention) As explained above, according to the present invention, sb as group V
A semiconductor substrate with excellent characteristics having an epitaxial layer of a ■-v group compound semiconductor based on the above can be realized.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す構成説明図、第2図は
その製造工程例図、第3図は第1図の構成要素の結晶構
造図、第4図は従来の基板の一例を示す構成説明図であ
る。 3・・・ガーネット系基板、4,5・・・InSbエピ
タキシャル層。 手続ネ巾正書(方式) 昭和62年4月15日
Fig. 1 is a configuration explanatory diagram showing one embodiment of the present invention, Fig. 2 is an example of its manufacturing process, Fig. 3 is a crystal structure diagram of the constituent elements in Fig. 1, and Fig. 4 is an example of a conventional substrate. FIG. 3... Garnet-based substrate, 4,5... InSb epitaxial layer. Procedure book (method) April 15, 1986

Claims (1)

【特許請求の範囲】[Claims]  ガーネット系基板上に、V族としてSbをベースとし
たIII−V族化合物半導体エピタキシャル層が形成され
たことを特徴とする半導体基板。
A semiconductor substrate characterized in that a III-V group compound semiconductor epitaxial layer based on Sb as a V group is formed on a garnet-based substrate.
JP1268987A 1987-01-22 1987-01-22 Semiconductor substrate Pending JPS63181352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1268987A JPS63181352A (en) 1987-01-22 1987-01-22 Semiconductor substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1268987A JPS63181352A (en) 1987-01-22 1987-01-22 Semiconductor substrate

Publications (1)

Publication Number Publication Date
JPS63181352A true JPS63181352A (en) 1988-07-26

Family

ID=11812344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1268987A Pending JPS63181352A (en) 1987-01-22 1987-01-22 Semiconductor substrate

Country Status (1)

Country Link
JP (1) JPS63181352A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420664A (en) * 1977-07-14 1979-02-16 Western Electric Co Method of selecting crystalline substance for compatible epitaxial growth and device for same substance
JPS61131524A (en) * 1984-11-30 1986-06-19 Yokogawa Electric Corp Semiconductor substrate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420664A (en) * 1977-07-14 1979-02-16 Western Electric Co Method of selecting crystalline substance for compatible epitaxial growth and device for same substance
JPS61131524A (en) * 1984-11-30 1986-06-19 Yokogawa Electric Corp Semiconductor substrate

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